Solution for Hard Sudoku #3146752398198
4
3
6
9
7
8
1
2
5
1
5
9
2
6
3
7
8
4
7
2
8
5
1
4
6
3
9
5
4
7
6
1
9
2
8
3
6
3
2
8
4
5
9
1
7
8
9
1
3
7
2
4
6
5
8
5
2
7
6
1
3
9
4
3
9
6
4
2
8
5
7
1
1
4
7
9
5
3
2
8
6
This Sudoku Puzzle has 63 steps and it is solved using Naked Single, Full House, Hidden Single, Locked Candidates Type 1 (Pointing), Locked Candidates Type 2 (Claiming), undefined, Turbot Fish techniques.
Naked Single
Explanation
Hidden Single
Explanation
Locked Candidates
Explanation
Locked Candidates
Explanation
Full House
Explanation
Solution Steps:
- Row 4 / Column 1 → 5 (Naked Single)
- Row 4 / Column 2 → 4 (Naked Single)
- Row 4 / Column 3 → 7 (Naked Single)
- Row 4 / Column 6 → 2 (Naked Single)
- Row 4 / Column 7 → 8 (Full House)
- Row 2 / Column 8 → 1 (Hidden Single)
- Row 3 / Column 6 → 4 (Hidden Single)
- Row 5 / Column 5 → 4 (Hidden Single)
- Row 5 / Column 4 → 8 (Hidden Single)
- Row 6 / Column 7 → 4 (Hidden Single)
- Row 9 / Column 3 → 4 (Hidden Single)
- Row 7 / Column 3 → 2 (Hidden Single)
- Row 1 / Column 9 → 8 (Hidden Single)
- Row 9 / Column 8 → 8 (Hidden Single)
- Row 7 / Column 1 → 8 (Hidden Single)
- Row 2 / Column 3 → 8 (Hidden Single)
- Locked Candidates Type 1 (Pointing): 3 in b1 => r1c78<>3
- Locked Candidates Type 1 (Pointing): 5 in b3 => r5c7<>5
- Locked Candidates Type 1 (Pointing): 1 in b8 => r9c2<>1
- Locked Candidates Type 2 (Claiming): 6 in r3 => r1c78,r2c7<>6
- 2-String Kite: 9 in r1c6,r6c3 (connected by r5c6,r6c4) => r1c3<>9
- Turbot Fish: 9 r2c1 =9= r1c2 -9- r1c6 =9= r5c6 => r5c1<>9
- XY-Wing: 6/9/3 in r1c3,r29c1 => r8c3<>3
- XY-Wing: 3/5/9 in r36c9,r6c4 => r3c4<>9
- Row 3 / Column 4 → 7 (Naked Single)
- Row 9 / Column 5 → 7 (Hidden Single)
- Row 9 / Column 7 → 2 (Hidden Single)
- Row 8 / Column 5 → 2 (Hidden Single)
- Row 1 / Column 8 → 2 (Hidden Single)
- Row 5 / Column 9 → 2 (Hidden Single)
- Row 7 / Column 6 → 6 (Hidden Single)
- Row 1 / Column 7 → 7 (Hidden Single)
- Row 5 / Column 8 → 7 (Hidden Single)
- Row 5 / Column 6 → 5 (Hidden Single)
- Row 6 / Column 4 → 9 (Full House)
- Row 9 / Column 6 → 1 (Naked Single)
- Row 1 / Column 6 → 9 (Full House)
- Row 6 / Column 9 → 5 (Hidden Single)
- Row 2 / Column 7 → 5 (Hidden Single)
- Row 2 / Column 5 → 6 (Naked Single)
- Row 1 / Column 5 → 5 (Full House)
- Row 2 / Column 1 → 9 (Full House)
- Row 1 / Column 4 → 1 (Full House)
- Row 9 / Column 1 → 3 (Naked Single)
- Row 5 / Column 1 → 6 (Full House)
- Row 7 / Column 2 → 5 (Naked Single)
- Row 7 / Column 4 → 3 (Full House)
- Row 9 / Column 4 → 5 (Full House)
- Row 9 / Column 2 → 9 (Full House)
- Row 5 / Column 7 → 3 (Naked Single)
- Row 6 / Column 8 → 6 (Full House)
- Row 6 / Column 3 → 3 (Full House)
- Row 3 / Column 8 → 3 (Full House)
- Row 5 / Column 2 → 1 (Naked Single)
- Row 5 / Column 3 → 9 (Full House)
- Row 8 / Column 7 → 9 (Naked Single)
- Row 3 / Column 7 → 6 (Full House)
- Row 3 / Column 9 → 9 (Full House)
- Row 8 / Column 9 → 3 (Full House)
- Row 1 / Column 3 → 6 (Naked Single)
- Row 1 / Column 2 → 3 (Full House)
- Row 8 / Column 2 → 6 (Full House)
- Row 8 / Column 3 → 1 (Full House)
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